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.300 Blackout Kits

PSA is your headquarters for ordering high-quality 300 blackout build kits and lower parts kits for your build. We have what every armorer needs to complete an AR-15 build with confidence. Our kits are tried and true and designed to beat the standard and be the standard. Be sure to also check out our selection of 300 blackout ammo. 

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  1. PSA Magpul MOE Lower Build Kit & 10 Magpul PMAG Gen 2 MOE 5.56x45 30rd Magazines

    PSA Magpul MOE Lower Build Kit & 10 Magpul PMAG Gen 2 MOE 5.56x45 30rd Magazines

    SAVE $63.00 When you add both!
    Regular Price $222.99 Special Price $159.99
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  2. PSA MOE Lower Build Kit & Vortex Strike Fire II Red Dot Sight

    PSA MOE Lower Build Kit & Vortex Strike Fire II Red Dot Sight

    $199.98
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  3. Premium Classic AR-15 Lower Build Kit in black

    Palmetto State Armory Premium Classic Lower Build Kit

    Rating:
    95%
    (365)
    Regular Price $199.99 Special Price $79.99
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  4. PSA B5 Systems EPT Lower Build Kit with SOPMOD Enhanced Stock, ODG

    PSA B5 Systems EPT Lower Build Kit with SOPMOD Enhanced Stock, ODG

    Rating:
    100%
    (18)
    Regular Price $239.99 Special Price $119.99
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  5. PSA B5 Systems EPT Lower Build Kit with SOPMOD Enhanced Stock, FDE

    PSA B5 Systems EPT Lower Build Kit with SOPMOD Enhanced Stock, FDE

    Rating:
    100%
    (9)
    Regular Price $239.99 Special Price $119.99
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  6. PSA B5 Systems EPT Lower Build Kit with SOPMOD Enhanced Stock, Black

    PSA B5 Systems EPT Lower Build Kit with SOPMOD Enhanced Stock, Black

    Rating:
    97%
    (37)
    Regular Price $189.99 Special Price $119.99
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  7. Palmetto State Armory Magpul AR-15 Lower Build Kit in Black

    Palmetto State Armory Magpul MOE Lower Build Kit, Black

    Rating:
    96%
    (2537)
    Regular Price $199.99 Special Price $99.99
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  8. MOE AR-15 lower build kit

    Palmetto State Armory Magpul MOE Lower Build Kit - OD Green

    Rating:
    96%
    (203)
    Regular Price $219.99 Special Price $99.99
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  9. PSA Shockwave MOE EPT Pistol Lower Build Kit, Flat Dark Earth

    PSA Shockwave MOE EPT Pistol Lower Build Kit, Flat Dark Earth

    Rating:
    95%
    (42)
    Regular Price $219.99 Special Price $159.99
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  10. PSA AR15 MOE Lower Build Kit W/PSA Custom Single Stage FCG, Black

    PSA AR15 MOE Lower Build Kit W/PSA Custom Single Stage FCG, Black

    Rating:
    100%
    (2)
    Regular Price $259.99 Special Price $169.99
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  11. PSA AR15 A2 Stock Kit, ODG

    PSA AR15 A2 Stock Kit, ODG

    Rating:
    100%
    (6)
    Regular Price $199.99 Special Price $79.99
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  12. PSA AR15 A2 Stock Kit, FDE

    PSA AR15 A2 Stock Kit, FDE

    Rating:
    100%
    (8)
    Regular Price $199.99 Special Price $79.99
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  13. PSA MOE EPT Pistol Lower Build Kit With Maxim PDW Brace, Black

    PSA MOE EPT Pistol Lower Build Kit With Maxim PDW Brace, Black

    Rating:
    95%
    (22)
    Regular Price $369.99 Special Price $229.99
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  14. PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with SOPMOD Stock, ODG

    PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with SOPMOD Stock, ODG

    Rating:
    100%
    (1)
    Regular Price $289.99 Special Price $169.99
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  15. PSA B5 Systems Lower Build Kit with SOPMOD Enhanced Stock, ODG

    PSA B5 Systems Lower Build Kit with SOPMOD Enhanced Stock, ODG

    Rating:
    97%
    (7)
    Regular Price $229.99 Special Price $139.99
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  16. PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with Bravo Stock, ODG

    PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with Bravo Stock, ODG

    Regular Price $279.99 Special Price $159.99
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  17. PSA B5 Systems Lower Build Kit with SOPMOD Enhanced Stock, FDE

    PSA B5 Systems Lower Build Kit with SOPMOD Enhanced Stock, FDE

    Rating:
    100%
    (2)
    Regular Price $229.99 Special Price $119.99
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  18. PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with SOPMOD Stock, FDE

    PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with SOPMOD Stock, FDE

    Rating:
    96%
    (5)
    Regular Price $289.99 Special Price $169.99
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  19. PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with Bravo Stock, FDE

    PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with Bravo Stock, FDE

    Rating:
    100%
    (2)
    Regular Price $279.99 Special Price $159.99
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  20. PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with SOPMOD Stock, Black

    PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with SOPMOD Stock, Black

    Rating:
    93%
    (6)
    Regular Price $289.99 Special Price $169.99
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  21. PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with Bravo Stock, Black

    PSA B5 2 Stage Nickel Boron Trigger Lower Build Kit with Bravo Stock, Black

    Rating:
    100%
    (1)
    Regular Price $279.99 Special Price $179.99
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  22. PSA B5 Systems Lower Build Kit with SOPMOD Enhanced Stock, Black

    PSA B5 Systems Lower Build Kit with SOPMOD Enhanced Stock, Black

    Rating:
    100%
    (5)
    Regular Price $229.99 Special Price $119.99
    Add to Wish List Add to Compare
  23. PSA B5 Systems Lower Build Kit with Bravo Stock, Black

    PSA B5 Systems Lower Build Kit with Bravo Stock, Black

    Rating:
    98%
    (39)
    Regular Price $219.99 Special Price $99.99
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  24. PSA B5 Systems EPT Lower Build Kit with Bravo Stock, Black

    PSA B5 Systems EPT Lower Build Kit with Bravo Stock, Black

    Rating:
    100%
    (7)
    Regular Price $229.99 Special Price $139.99
    Add to Wish List Add to Compare
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